# coding=utf-8
def main():
	result = []
	for line in open("02.txt"):
		result.append(filter(lambda x: x.isalpha(), line))
	print "".join(result)
	# 打印：equality
	# 下一关：http://www.pythonchallenge.com/pc/def/equality.html

if __name__ == "__main__":
	main()
